/* Copyright (c) 2020 XEPIC Corporation Limited */
/*
 * Copyright (c) 2012-2015 Stephen Williams (steve@icarus.com)
 *
 *    This source code is free software; you can redistribute it
 *    and/or modify it in source code form under the terms of the GNU
 *    General Public License as published by the Free Software
 *    Foundation; either version 2 of the License, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA.
 */

#include "compile.h"
#include "schedule.h"
#include "vpi_priv.h"
#include "vvp_net_sig.h"
#ifdef CHECK_WITH_VALGRIND
#include "vvp_cleanup.h"
#endif
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>

#include "ivl_alloc.h"

using namespace std;

__vpiStringVar::__vpiStringVar(__vpiScope *sc, const char *na, vvp_net_t *ne)
    : __vpiBaseVar(sc, na, ne) {}

int __vpiStringVar::get_type_code(void) const { return vpiStringVar; }

int __vpiStringVar::vpi_get(int code) {
  vvp_fun_signal_string *fun =
      dynamic_cast<vvp_fun_signal_string *>(get_net()->fun);
  assert(fun);
  string str = fun->get_string();

  switch (code) {
    case vpiSize:
      // The vpiSize of a string variable is the number of
      // bytes (characters) in that string.
      return str.size();
    case vpiLeftRange:
      return 0;
    case vpiRightRange:
      return str.size() - 1;
    default:
      fprintf(stderr, "vpi sorry: property is not implemented");
      assert(false);
      return 0;
  }
}

void __vpiStringVar::vpi_get_value(p_vpi_value val) {
  vvp_fun_signal_string *fun =
      dynamic_cast<vvp_fun_signal_string *>(get_net()->fun);
  assert(fun);
  string str = fun->get_string();

  if (val->format == vpiStringVal || val->format == vpiObjTypeVal) {
    char *rbuf = (char *)need_result_buf(str.size() + 1, RBUF_VAL);
    strcpy(rbuf, str.c_str());
    val->format = vpiStringVal;
    val->value.str = rbuf;
    return;
  }

  val->format = vpiSuppressVal;
}

vpiHandle __vpiStringVar::vpi_put_value(p_vpi_value val, int) {
  vvp_fun_signal_string *fun =
      dynamic_cast<vvp_fun_signal_string *>(get_net()->fun);
  assert(fun);
  assert(val->format == vpiStringVal);
  vvp_net_ptr_t dest(get_net(), 0);
  vvp_send_string(dest, val->value.str, vthread_get_wt_context());
  return 0;
}

vpiHandle vpip_make_string_var(const char *name, vvp_net_t *net) {
  __vpiScope *scope = vpip_peek_current_scope();
  const char *use_name = name ? vpip_name_string(name) : 0;

  __vpiStringVar *obj = new __vpiStringVar(scope, use_name, net);

  return obj;
}

#ifdef CHECK_WITH_VALGRIND
void string_delete(vpiHandle item) {
  __vpiStringVar *obj = dynamic_cast<__vpiStringVar *>(item);
  delete obj;
}
#endif
